A bipartisan group of Texas legislators has asked the Biden administration to intervene on behalf of U.S. energy companies operating in Mexico amid the latter country’s increasingly nationalistic energy policies.

AMLO

Sens. John Cornyn and Ted Cruz, along with 18 of the state’s 32 U.S. representatives, signed a letter Tuesday (Oct. 19) to U.S. Ambassador to Mexico Ken Salazar expressing concern with “recent actions taken by the Mexican administration to favor state owned enterprises (SOEs) and push out American investment.”

Through a proposed legislative overhaul, Mexico President Andrés Manuel López Obrador is seeking to roll back provisions of Mexico’s landmark 2013-2014 constitutional energy reform, as well as private sector participation schemes in the power sector in...